# US 7,610,829 B2 · Transmission

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- Number: US 7,610,829 B2
- Document ID: US7610829B2
- Status: Granted
- Kind: B2
- Application number: 12/051,236
- Filed: 2008-03-19
- Published: 2008-12-11
- Granted: 2009-11-03
- Earliest claimed: 2007-06-11
- Assignees: Mitsubishi Jidosha Kogyo Kabushiki Kaisha; Mitsubishi Jidosha Engineering Kabushiki Kaisha
- Inventors: Masanori Shintani; Koji Kasuya
- Web page: https://patentgrep.com/patent/US7610829B2

## CPC

- F16H 61/688: with two inputs, e.g. selection of one of two torque-flow paths by clutches
- F16H 63/20: with preselection and subsequent movement of each final output mechanism by movement of the final actuating mechanism in two different ways, e.g. guided by a shift gate
- F16H 2063/025: {Final output mechanisms for double clutch transmissions}
- F16H 2063/208: {using two or more selecting fingers}
- F16H 2063/3086: {Shift head arrangements, e.g. forms or arrangements of shift heads for preselection or shifting}
- F16H 2306/18: Preparing coupling or engaging of future gear
- Y10T 74/20: Control lever and linkage systems
- Y10T 74/20012: Multiple controlled elements
- Y10T 74/20018: Transmission control
- Y10T 74/2003: Electrical actuator
- Y10T 74/20177: Particular element [e.g., shift fork, template, etc.]
- F16H: GEARING
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A transmission, includes: a plurality of shift members, adapted to be moved in a shifting direction and a selecting direction; a shift lug, having a pair of claw portions spaced apart from each other in the shifting direction; and a shift fork, connected to the shift lug via a shift rail. The shift members are moved by an actuator so that one of the shift members pushes one of the claw portions in the shifting direction to thereby selectively move the shift lug in the shifting direction so as to cause the shift fork to perform a gear shift operation via the shift rail. The shift members are disposed as to be offset from each other in the shifting direction.

## Claims

### Claim 1

A transmission provided with a dual-clutch-type transmission mechanism, comprising:
a plurality of shift members which are adapted to be moved integrally in a shifting direction and a selecting direction;
a plurality of shift lugs which are arranged in the selecting direction, each of the shift lugs having a pair of claw portions spaced apart from each other in the shifting direction; and
a shift fork which is connected to one of the shift lugs via a shift rail and performs a gear shift operations, wherein
the shift members are moved by an actuator so that one of the shift members pushes one of the pair of claw portions of one of the shift lugs in the shifting direction to thereby selectively move the one of the shift lugs in the shifting direction so as to cause the shift fork to perform the gear shift operation via the shift rail, and
while first one of the shift lugs is held at a shift position, a gear shift operation of second one of the shift lugs is performed,
wherein
while one of the shift members is inserted into a space between the pair of claw portions, to make the shift members moveable in the selecting direction without interfering with the shift lugs, the other of the shift members is disposed as to be offset relative to the one of the shift members in the shifting direction such that the other of the shift members is positioned at a retracting position outside the pair of claw portions in the shifting direction.

### Claim 2 (depends on 1)

The transmission as set forth in claim 1, wherein:
the transmission further includes a shaft which has an axis extended in the selecting direction and is adapted to be moved in the selecting direction and is rotated in the shifting direction by the actuator, and
the shift members project from an outer circumference of the shaft so as to form a pawl shape.

### Claim 3 (depends on 1, 2)

The transmission as set forth in claim 1 or 2, wherein:
the pair of claw portions are disposed so as to be offset from each other with an offset quantity than a width of the one of the shift members in the selecting direction so as to make the one of the shift members movable in a direction opposite to the shifting direction while the first one of the shift lugs is held at the shift position after the one of the shift members pushes the first one of the shift lugs in the shifting direction.

### Claim 4 (depends on 2, 3)

The transmission as set forth in claims 2 or 3, wherein:
the axis of the shaft is arranged on an approximately straight line extending in an extending direction of the pair of claw portions from a center position of the space between the pair of claw portions in the shifting direction at a neutral position of one of the shift lugs.

### Claim 5 (depends on 1)

The transmission as set forth in any one of claim 1, wherein:
a width of the one of the shift members in the shifting direction and the space between the pair of claw portions in the shifting direction are substantially equal.